/Engine/Source/Runtime/Landscape/Public/LandscapeEdit.h
Without data interpolation.
template<typename TStoreData> void GetWeightDataTemplFast ( [ULandscapeLayerInfoObject](API\Runtime\Landscape\ULandscapeLayerInfoObject) * LayerInfo, const int32 X1, const int32 Y1, const int32 X2, const int32 Y2, TStoreData & StoreData )